Table 1—

Characteristics of total Medicare population, aged 18–75 years, with diabetes compared with elderly, disabled, and ESRD subpopulations with diabetes

Subpopulations
Subpopulation overlaps*
Total population (age 18–75 years)Elderly (age 65–75 years)Disabled (under age 65 years)With ESRD (any age)Elderly to disabledElderly to ESRDDisabled to ESRD
N1,941,5171,553,216352,08756,214
Age (years) (mean/median)67.5/7070.9/7154.1/5659.8/6213.4%44.3%77.8%
Dually eligible26.8%20.5%51.1%46.8%73.5%77.1%96.6%
With ESRD2.9%0%0%100%
Female54.4%55.7%49.2%52.0%94.8%97.0%97.8%
Black16.0%13.2%24.4%37.4%88.4%76.9%88.7%
White77.1%80.4%67.5%49.4%88.1%73.0%85.2%
No. of outpatient visits (mean/median)15.7/1314.8/1216.8/1434.6/3393.6%44.9%53.7%
Mean ZQ rating47.247.745.246.387.8%93.4%94.6%
With chronic diabetes complications46.6%44.1%49.8%92.7%95.5%52.1%57.2%
Modified Charlson index (mean/median)2.1/22.0/21.9/15.1/598.0%49.4%47.3%
Received HbA1c67.8%69.5%62.7%54.7%94.2%87.7%93.6%
Received eye exam68.3%71.5%54.0%70.0%86.0%98.7%87.0%
Received lipid profile56.8%59.2%50.0%33.1%92.2%77.4%86.0%
  • *

    * Percentage overlap of independent subpopulation distributions, as calculated by Tilton’s overlap procedure (see refs. 18 and 19).

  • See ref. 15.